Gael schlickeysen



(No Model.)

G. SOHLIGKEYSEN.

SCREENING APPARATUS.

No. 316,068. Patented Apr. 21, 1885.

IIIIIIlI/I r4. PETERS, PllbltrL'vllwgrapher. Washington. u c.

UNITED STATES PATENT UEErcE.

CARL SGHLIOKEYSEN, OF BERLIN, GERMANY.

SCREENING APPARATUS.

SPECIFICATION forming'part of Letters Patent No. 316,068, dated April21, 1885.

Application filed April 28, 1884. (No model.) Patented in GermanySeptember 27, 1883, No.28,876; in France November 30, 1883, No. 158,886;in England January 7, 1884, No. 904, and in Belgium'Api-il 1, 1884, No.64,697.

To aZZ whom it may concern.-

Be it known that I, CARL SoHLIcKEYsEN, of Berlin,Prussia, Germany,haveinvented certain new and useful Improvements in Screening Apparatus,of which the following is a full, clear, and exact description.

'According to this invention an inclined screen or sieve for separatingor sorting granular or pulverulent materials is supported upon an axisor fulcrum in such a manner that when the material to be screened isdelivered at intervals thereon the end of the screen is caused first todescend a certain distance until it comes in contact with a stop, sothat the shock imparted to the screen by such impact will assist incausing the small particles of the material to pass through the meshesthereof, and will also facilitate the passing of the larger particlesalong the upper surface of the screen; and, secondly, the same end ofthe screen is made to rise again after the shock of the downward blow,and in again striking against a second. stop it is caused by such secondshock to still further facilitate the passage of the material throughand from off it.

The invention is capable of being carried into effect in various ways;thus, according to one arrangement, the screen is mounted on an axis oron pivots at or near its middle, the lower part being made to somewhatoverbalance the upper part, so that the latter is kept up against a stopabove it, or the former is kept against a stop below it; or the axis orfulcrum of the screen may be at or near one end thereof, and the otherend be kept in a raised position against a stop by a weighted armextended beyond the axis, or by a spring. In either case, on throwingthe material to be screened upon theupper end of the screen, this isbrought down forcibly against a stop, and the force of the impetus beingthus neutralized the screen is caused by the preponderating wcight atthe other end to rise and strike forcibly against the upper stop.

Reference is to be had to the accompanying drawings,forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a vertical section. Fig. 2 is a section at right angles toFig. 1 on a larger scale. Figs. 3, 4, 5 show portions ofmodifications.They are sections corresponding to Fig. 2. 1

Referring to Figs. 1 and 2, the screen 0 is mounted on an axis, 0,carried in bearings on each side of the frame or carriage B, the screenbeing free to oscillate on such axis, but having its motion limited bythe stops B and B The upper end is held suspended in a raised posit-ionby weights 0. If now aquantity of sand, coals, or other material isthrown onto this suspended screen surface, the impetus will cause it todescend suddenly with a blow against the upper stop, B, whereby a largepart of the fine material thrown on will be caused to pass through. Themovement of the coarse material along the upper surface of the screensoon after moves the lower end of the screen down with a blow againstthe lower stop, B", thereby producing such a concussion of the screen asto cause the remaining portion of fine material to pass through themeshes, while the coarse particles pass down the upper surface and aredelivered into a proper receptacle through a passage, B

In order to effectually distribute Wet material as it passes onto thescreen 0, and thus prevent its meshes from becoming clogged, and also toprevent it from injury by large stones or lumps of material, a coarsescreen or grating, L, with stout bar's, is arranged above the screen 0,onto which the material is thrown in the first instance. By thusaffording the screen 0' an automatic oscillating action the applicationof special power for imparting a continuous motion thereto is avoided,the impetus of the falling mass affording the requisite power. In anyscreen the concu'ssions produce a motion which is directly contrary tothe momentary movement of the material being screened, and thus thescreen- 'ing operation is much more facilitated than is the case whereregular periodical movements independent of the motion of the materialare imparted to the screen.

It will be readily understood that the axis on which the screenoscillates need not necessarily be as shown; it can be placed in anyother position, above, below, or in the plane of the screen at or nearits middle, the one half of the screen being overweighted so as to bekept against a stop, while the material is thrown upon the other half.It is also not necessary that the axis should be near the middle; it maybe arranged more or less near to or even at or beyond one end thereof.

The balance-weight C", for keeping the screen in the raised position,must then be carried by an arm or lever, J, projecting a sufficientdistance beyond the axis, as shown, for instance, at Fig. 4, where theaxis of the upper screen is situated, at the lower end thereof, whilethat of the lower fine screen is situated at the upper end. The screensmay also be arranged to strike against stops situated above them inorder to produce the required concussions. I

The upper end of the screen may be advantageously widened somewhat. Itis provided with a sheet-metal extension, B, so that the concu'ssiveeffect may be increased by the material being thrown by a shovel orotherwise upon such surface before sliding onto the screening-surface.

As shown in Figs. 2 and 3, the lowermost screen,O, is worked by meansofa cam, I, turned by any suitable means, (not represented, which ismade to depress the upper end and then leave it free, allowing it to beraised with a jerk against the stop B by the superior gravity of thelower end and its load.

In order to obviate the difliculty now exist-' ing in having to bringlarge masses of sand and other materials to the place where thescreening apparatus is situated, the framing of the screen is mounted onwheels D, as shown in Figs. 1 and 2, and below the chute of the screen,between the wheels, is arranged an endless traveling apron, E, stretchedover two rollers, F, so that the screened material in falling from thechute onto the apron is carried thereby to the chain-buckets G. Thetraveling apron,together with the rails H for the carriage, are arrangedto extend any required distance along the face of the heaps of materialto be screened, so that the screening apparatus can be moved to anydesired part of the latter, the carriage being arranged either to runupon wheels, as shown, or to slide upon the rails.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In combination with a movable frame, B D, having achute for the screened material and a chute for the refuse and materialto be again subjected to treatment, an oscillating screen having itsaxis above the center, and stops, as B B all arranged as described,whereby the force of each charge will throw'the screen forcibly againstthe stops B, and the gravitating material will operate the screenreversely against the stop. B as set forth.

2. In combination with the movable frame B, having chutes,as shown, thepivoted screen 0, having counter-weights G the grating L, and stops B Bas set forth, I

3. The combination, with the supportingframe, of the finer and coarserscreens 0, hav' ing their axis and counter-weights arranged reversely,and the stops B B, as herein spec- 4. The combination, with the screen0, pivoted at O, of the lever J, carrying weight 0 the apron B, and thestops B B as set forth, I

5. The combination,with the movable frame B D and screening apparatus,as described, of the carrying-apron E, receiving therefrom and elevatingor carrying buckets G, as and for the purposes set forth. I

In testimony whereof I have hereunto set my hand, at Berlin, this 28thday of December, 1883, in the presence of two subscribing wit nesses. v

CARL SOHLIOKEYSEN.

Witnesses:

CARL GRONERT, PAUL RUI-IUL.

